6a3356ab3f
This was meant to migrate CoreAudio onto the same SDL_RunAudio() path that most other audio drivers are on, but it introduced a bug because it doesn't deal with dropped audio buffers...and fixing that properly just introduces latency. I might revisit this later, perhaps by reworking SDL_RunAudio to allow for this sort of API better, or redesigning the whole subsystem or something, I don't know. I'm not super-thrilled that this has to exist outside of the usual codepaths, though. Fixes Bugzilla #4481.
69 lines
1.9 KiB
Objective-C
69 lines
1.9 KiB
Objective-C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#ifndef SDL_coreaudio_h_
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#define SDL_coreaudio_h_
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#include "../SDL_sysaudio.h"
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#if !defined(__IPHONEOS__)
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#define MACOSX_COREAUDIO 1
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#endif
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#if MACOSX_COREAUDIO
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#include <CoreAudio/CoreAudio.h>
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#include <CoreServices/CoreServices.h>
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#else
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#import <AVFoundation/AVFoundation.h>
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#import <UIKit/UIApplication.h>
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#endif
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#include <AudioToolbox/AudioToolbox.h>
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#include <AudioUnit/AudioUnit.h>
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/* Hidden "this" pointer for the audio functions */
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#define _THIS SDL_AudioDevice *this
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struct SDL_PrivateAudioData
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{
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SDL_Thread *thread;
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AudioQueueRef audioQueue;
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AudioQueueBufferRef *audioBuffer;
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void *buffer;
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UInt32 bufferOffset;
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UInt32 bufferSize;
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AudioStreamBasicDescription strdesc;
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SDL_sem *ready_semaphore;
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char *thread_error;
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SDL_atomic_t shutdown;
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#if MACOSX_COREAUDIO
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AudioDeviceID deviceID;
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#else
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SDL_bool interrupted;
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CFTypeRef interruption_listener;
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#endif
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};
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#endif /* SDL_coreaudio_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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